Hidden room doors can be installed for a variety of purposes. You can create a safe room by installing an InvisiDoor. Only people you've told about the room will know it exists, which enhances your safety if you ever need to hide in an emergency. Less serious uses include blocking off a seldom used room or creating a hidden closet door. Hidden room doors block any guests from knowing there's a junk room or unused room behind a wall.

Another preferred way to have an undetectable hidden room is by creating it in the basement of your house. In most houses, the presence of the basement can go easily unnoticed. You can create an entrance to the basement from a doorway created in the floor of the ground floor.

Folding Bookcase Closet Door. A great way to keep a room your area hidden from your visitor is to install the SpaceXDoors. It expands the wall space that you can use and keeps hidden a closet, entertainment center or vault. This door is perfect replacement door ideas because of its aesthetic feature and function. As this door also works as a functioning bookcase, you can fill it with items totaling more than 300 pounds and yet open and close it effortlessly and smoothly. It can accommodate an opening of 24 inches to as big as 10 feet. Standard sizes are 49 inches by 83 inches, 61 inches by 83 inches and 76 inches by 83 inches. Available wood and veneers include hickory, oak, knotty pine, melamine, panolam, birch, alder, cherry, mahogany and oak.